JAVASCRIPT

convert string array to objectid mongoose

let objectIdArray = stringObjectIdArray.map(s => mongoose.Types.ObjectId(s));
//or
let objectIdArray = stringObjectIdArray.map(mongoose.Types.ObjectId);

convert string or string array to object mongoose object id

function toObjectId(ids) {

    if (ids.constructor === Array) {
        return ids.map(mongoose.Types.ObjectId);
    }

    return mongoose.Types.ObjectId(ids);
}